20051205031 has 16 divisors (see below), whose sum is σ = 23588490240. Its totient is φ = 16803450720.

The previous prime is 20051205007. The next prime is 20051205049. The reversal of 20051205031 is 13050215002.

It is a cyclic number.

It is not a de Polignac number, because 20051205031 - 2¹⁵ = 20051172263 is a prime.

It is a super-2 number, since 2×20051205031² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20051205731) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11890 + ... + 200608.

It is an arithmetic number, because the mean of its divisors is an integer number (1474280640).

Almost surely, 2^20051205031 is an apocalyptic number.

20051205031 is a deficient number, since it is larger than the sum of its proper divisors (3537285209).

20051205031 is a wasteful number, since it uses less digits than its factorization.

20051205031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189486.

The product of its (nonzero) digits is 300, while the sum is 19.

The spelling of 20051205031 in words is "twenty billion, fifty-one million, two hundred five thousand, thirty-one".